2013 was nothing less than a blockbuster success for Windows Phone, which went from industry also-ran to the undisputed third mobile ecosystem, and is poised to challenge iPhone for the number two spot. You didn't think it could get this good? That's OK, neither did I.

Windows Phone seemingly turns a corner with every new application, small operating system update, and new Nokia Lumia. It's turning so many corners it's running in circles.

Nailed. Nokia had the strongest brand loyalty and yet lost 9 out of 10 customers with WP. So, somehow 9 out of 10 ex-customers where satisfied with Symbian but are not with WP. Thats a lot. Thats with so called outdated Symbian!

Still 1 out of 10 customers stayed with Nokia and got a Lumia since Nokia does not offer anything else. And now Nokia is gone. So, what will the 1 out of 10 customer left do? Switching to Android like the other 9? Not a significant number on top of >80% market share Android but for ~3% market share WP any lost customer is, in relative percentage, another big step backwards.